Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $7,958,987 and $7,797,430 at September 30, 2025 and December 31, 2024, respectively)	$ 28,609,784	$ 27,870,623
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at September 30, 2025 and December 31, 2024, respectively)	372,747	372,922
Right of use assets - operating leases (amounts related to VIEs of $0 and $140,558 at September 30, 2025 and December 31, 2024, respectively)	321,063	334,767
Less: accumulated depreciation (amounts related to VIEs of $(1,721,829) and $(1,628,274) at September 30, 2025 and December 31, 2024, respectively)	(8,008,908)	(7,528,057)
Cash and cash equivalents (amounts related to VIEs of $191,606 and $373,737 at September 30, 2025 and December 31, 2024, respectively)	861,066	1,254,882
Cash held in escrows (amounts related to VIEs of $5,003 and $4,979 at September 30, 2025 and December 31, 2024, respectively)	77,663	80,314
Tenant and other receivables, net (amounts related to VIEs of $42,233 and $20,435 at September 30, 2025 and December 31, 2024, respectively)	136,743	107,453
Accrued rental income, net (amounts related to VIEs of $465,408 and $435,110 at September 30, 2025 and December 31, 2024, respectively)	1,532,403	1,466,220
Deferred charges, net (amounts related to VIEs of $206,016 and $211,726 at September 30, 2025 and December 31, 2024, respectively)	802,785	813,345
Prepaid expenses and other assets (amounts related to VIEs of $51,682 and $15,036 at September 30, 2025 and December 31, 2024, respectively)	137,561	70,839
Mortgage notes payable, net (amounts related to VIEs of $3,285,659 and $3,282,027 at September 30, 2025 and December 31, 2024, respectively)	4,279,482	4,276,609
Lease liabilities - finance leases (amounts related to VIEs of $21,042 and $20,931 at September 30, 2025 and December 31, 2024, respectively)	363,207	370,885
Lease liabilities - operating leases (amounts related to VIEs of $0 and $157,691 at September 30, 2025 and December 31, 2024, respectively)	379,792	392,686
Accounts payable and accrued expenses (amounts related to VIEs of $111,058 and $115,808 at September 30, 2025 and December 31, 2024, respectively)	484,798	401,874
Other liabilities (amounts related to VIEs of $91,767 and $126,202 at September 30, 2025 and December 31, 2024, respectively)	$ 406,820	$ 450,796
Reedemable deferred stock units, units	107,696	128,227
Limited Partners' Capital Account, Units Outstanding (in units)	156,632,416
General Partners' Capital Account, Units Outstanding (in units)	1,767,998
Excess stock, par value	$ 0.01	$ 0.01
Excess stock, shares authorized	150,000,000	150,000,000
Excess stock, shares outstanding	0	0
Excess stock, shares issued	0	0
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock / units, shares / units issued (in shares / units)	0	0
Preferred stock / units, shares / units outstanding (in shares / units)	0	0
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common stock, shares authorized	250,000,000	250,000,000
Common stock, shares issued	158,479,314	158,253,895
Common Stock, Shares, Outstanding	158,400,414	158,174,995
Treasury common stock at cost, shares	78,900	78,900
Related Party
Note Receivable, after Allowance for Credit Loss	$ 88,879	$ 88,779
Nonrelated Party
Note Receivable, after Allowance for Credit Loss	8,898	4,947
Boston Properties Limited Partnership
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $7,958,987 and $7,797,430 at September 30, 2025 and December 31, 2024, respectively)	28,248,312	27,504,358
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at September 30, 2025 and December 31, 2024, respectively)	372,747	372,922
Right of use assets - operating leases (amounts related to VIEs of $0 and $140,558 at September 30, 2025 and December 31, 2024, respectively)	321,063	334,767
Less: accumulated depreciation (amounts related to VIEs of $(1,721,829) and $(1,628,274) at September 30, 2025 and December 31, 2024, respectively)	(7,875,405)	(7,397,882)
Cash and cash equivalents (amounts related to VIEs of $191,606 and $373,737 at September 30, 2025 and December 31, 2024, respectively)	861,066	1,254,882
Cash held in escrows (amounts related to VIEs of $5,003 and $4,979 at September 30, 2025 and December 31, 2024, respectively)	77,663	80,314
Tenant and other receivables, net (amounts related to VIEs of $42,233 and $20,435 at September 30, 2025 and December 31, 2024, respectively)	136,743	107,453
Accrued rental income, net (amounts related to VIEs of $465,408 and $435,110 at September 30, 2025 and December 31, 2024, respectively)	1,532,403	1,466,220
Deferred charges, net (amounts related to VIEs of $206,016 and $211,726 at September 30, 2025 and December 31, 2024, respectively)	802,785	813,345
Prepaid expenses and other assets (amounts related to VIEs of $51,682 and $15,036 at September 30, 2025 and December 31, 2024, respectively)	137,561	70,839
Mortgage notes payable, net (amounts related to VIEs of $3,285,659 and $3,282,027 at September 30, 2025 and December 31, 2024, respectively)	4,279,482	4,276,609
Lease liabilities - finance leases (amounts related to VIEs of $21,042 and $20,931 at September 30, 2025 and December 31, 2024, respectively)	363,207	370,885
Lease liabilities - operating leases (amounts related to VIEs of $0 and $157,691 at September 30, 2025 and December 31, 2024, respectively)	379,792	392,686
Accounts payable and accrued expenses (amounts related to VIEs of $111,058 and $115,808 at September 30, 2025 and December 31, 2024, respectively)	484,798	401,874
Other liabilities (amounts related to VIEs of $91,767 and $126,202 at September 30, 2025 and December 31, 2024, respectively)	$ 406,820	$ 450,796
Reedemable deferred stock units, units	107,696	128,227
Limited Partners' Capital Account, Units Outstanding (in units)	156,632,416	156,412,584
General Partners' Capital Account, Units Outstanding (in units)	1,767,998	1,762,411
NonControlling Interest Redeemable Partnership Units Common Units Shares Outstanding	15,696,776	15,730,882
NonControlling Interest Redeemable Partnership Units Common Units Long Term Incentive Units At Redemption Value Shares Outstanding	2,702,590	2,335,229
Boston Properties Limited Partnership \| Related Party
Note Receivable, after Allowance for Credit Loss	$ 88,879	$ 88,779
Boston Properties Limited Partnership \| Nonrelated Party
Note Receivable, after Allowance for Credit Loss	8,898	4,947
Variable Interest Entity, Primary Beneficiary [Member]
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $7,958,987 and $7,797,430 at September 30, 2025 and December 31, 2024, respectively)	7,958,987	7,797,430
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at September 30, 2025 and December 31, 2024, respectively)	21,000	21,000
Right of use assets - operating leases (amounts related to VIEs of $0 and $140,558 at September 30, 2025 and December 31, 2024, respectively)	0	140,558
Less: accumulated depreciation (amounts related to VIEs of $(1,721,829) and $(1,628,274) at September 30, 2025 and December 31, 2024, respectively)	(1,721,829)	(1,628,274)
Cash and cash equivalents (amounts related to VIEs of $191,606 and $373,737 at September 30, 2025 and December 31, 2024, respectively)	191,606	373,737
Cash held in escrows (amounts related to VIEs of $5,003 and $4,979 at September 30, 2025 and December 31, 2024, respectively)	5,003	4,979
Tenant and other receivables, net (amounts related to VIEs of $42,233 and $20,435 at September 30, 2025 and December 31, 2024, respectively)	42,233	20,435
Accrued rental income, net (amounts related to VIEs of $465,408 and $435,110 at September 30, 2025 and December 31, 2024, respectively)	465,408	435,110
Deferred charges, net (amounts related to VIEs of $206,016 and $211,726 at September 30, 2025 and December 31, 2024, respectively)	206,016	211,726
Prepaid expenses and other assets (amounts related to VIEs of $51,682 and $15,036 at September 30, 2025 and December 31, 2024, respectively)	51,682	15,036
Mortgage notes payable, net (amounts related to VIEs of $3,285,659 and $3,282,027 at September 30, 2025 and December 31, 2024, respectively)	3,285,659	3,282,027
Lease liabilities - finance leases (amounts related to VIEs of $21,042 and $20,931 at September 30, 2025 and December 31, 2024, respectively)	21,042	20,931
Lease liabilities - operating leases (amounts related to VIEs of $0 and $157,691 at September 30, 2025 and December 31, 2024, respectively)	0	157,691
Accounts payable and accrued expenses (amounts related to VIEs of $111,058 and $115,808 at September 30, 2025 and December 31, 2024, respectively)	111,058	115,808
Other liabilities (amounts related to VIEs of $91,767 and $126,202 at September 30, 2025 and December 31, 2024, respectively)	91,767	126,202
Variable Interest Entity, Primary Beneficiary [Member] \| Boston Properties Limited Partnership
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $7,958,987 and $7,797,430 at September 30, 2025 and December 31, 2024, respectively)	7,958,987	7,797,430
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at September 30, 2025 and December 31, 2024, respectively)	21,000	21,000
Right of use assets - operating leases (amounts related to VIEs of $0 and $140,558 at September 30, 2025 and December 31, 2024, respectively)	0	140,558
Less: accumulated depreciation (amounts related to VIEs of $(1,721,829) and $(1,628,274) at September 30, 2025 and December 31, 2024, respectively)	(1,721,829)	(1,628,274)
Cash and cash equivalents (amounts related to VIEs of $191,606 and $373,737 at September 30, 2025 and December 31, 2024, respectively)	191,606	373,737
Cash held in escrows (amounts related to VIEs of $5,003 and $4,979 at September 30, 2025 and December 31, 2024, respectively)	5,003	4,979
Tenant and other receivables, net (amounts related to VIEs of $42,233 and $20,435 at September 30, 2025 and December 31, 2024, respectively)	42,233	20,435
Accrued rental income, net (amounts related to VIEs of $465,408 and $435,110 at September 30, 2025 and December 31, 2024, respectively)	465,408	435,110
Deferred charges, net (amounts related to VIEs of $206,016 and $211,726 at September 30, 2025 and December 31, 2024, respectively)	206,016	211,726
Prepaid expenses and other assets (amounts related to VIEs of $51,682 and $15,036 at September 30, 2025 and December 31, 2024, respectively)	51,682	15,036
Mortgage notes payable, net (amounts related to VIEs of $3,285,659 and $3,282,027 at September 30, 2025 and December 31, 2024, respectively)	3,285,659	3,282,027
Lease liabilities - finance leases (amounts related to VIEs of $21,042 and $20,931 at September 30, 2025 and December 31, 2024, respectively)	21,042	20,931
Lease liabilities - operating leases (amounts related to VIEs of $0 and $157,691 at September 30, 2025 and December 31, 2024, respectively)	0	157,691
Accounts payable and accrued expenses (amounts related to VIEs of $111,058 and $115,808 at September 30, 2025 and December 31, 2024, respectively)	111,058	115,808
Other liabilities (amounts related to VIEs of $91,767 and $126,202 at September 30, 2025 and December 31, 2024, respectively)	$ 91,767	$ 126,202

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Present value of lessee's discounted obligation for lease payments from operating lease.

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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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Amount of cash and cash equivalent restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate.

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Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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Amount of a new issue of securities classified as temporary equity that are allocated to investors for them to buy. When securities are sold on a subscription basis, the issuer does not initially receive the total proceeds. In general, the issuer does not issue the securities to the investor until it receives the entire proceeds. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

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